package com.heima.article.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.article.service.ApArticleService;
import com.heima.article.service.ArticleFreemarkerService;
import com.heima.common.constants.ArticleConstants;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.pojos.ApArticle;
import com.heima.model.search.vos.SearchArticleVo;
import freemarker.template.Configuration;
import freemarker.template.Template;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;

@Slf4j
@Service
@Transactional
public class ArticleFreemarkerServiceImpl implements ArticleFreemarkerService {

    @Autowired
    private Configuration configuration;

    @Autowired
    private FileStorageService fileStorageService;

    @Autowired
    private ApArticleService apArticleService;

    @Autowired
    private KafkaTemplate<String,String> kafkaTemplate;

    /**
     * 生成静态文件上传到minIO中
     * @param apArticle
     * @param content
     */
    @Async
    @Override
    public void buildArticleToMinIO(ApArticle apArticle, String content) {
        StringWriter out = new StringWriter();
        Template template = null;
        try {
            //模板
            template = configuration.getTemplate("article.ftl");
            //数据模型
            Map contentDateModel = new HashMap<>();
            contentDateModel.put("content",JSONArray.parseArray(content));
            //结合
            template.process(contentDateModel,out);
        } catch (Exception e){
            e.printStackTrace();
        }

        //把HTML文件上传到minio中
        InputStream in = new ByteArrayInputStream(out.toString().getBytes());
        String path = fileStorageService.uploadImgFile("",apArticle.getId()+".html",in);

        //修改ap_article表保存static_url字段
        apArticleService.update(Wrappers.<ApArticle>lambdaUpdate().eq(ApArticle::getId,apArticle.getId())
                .set(ApArticle::getStaticUrl,path));

        //发送消息创建es索引
        createArticleESIndex(apArticle,content,path);
    }

    /**
     * 发送消息创建es索引
     * @param apArticle
     * @param content
     * @param path
     */
    private void createArticleESIndex(ApArticle apArticle, String content, String path) {
        SearchArticleVo searchArticleVo = new SearchArticleVo();
        BeanUtils.copyProperties(apArticle,searchArticleVo);
        searchArticleVo.setContent(content);
        searchArticleVo.setStaticUrl(path);

        kafkaTemplate.send(ArticleConstants.ARTICLE_ES_SYNC_TOPIC, JSON.toJSONString(searchArticleVo));
    }
}
